Paring knife



.J. STAERK PARING KNIFE Oct 7 1924.

Filed i-"eb. 29 1924 J/L/UJ qimnwg 9 I 1 um'rso s'rarss P E JULIUS STAERK, or CHICAGO, ILLINOIS.

Patented Oct. 7, 1924.

PARING KNIFE.

Application filed February 29, 1924.. Serial No. 696,042.

To all whom it may concern.

Be it known that I, JULIUS STAERK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Paring Knives, of which the following is a specification.

This invention relates to improvements in paring knives for chiropodists.

One of the objects of the invention is to provide a knife especially adapted for use by chiropodists which may be used to remove callous growths or formations, on the feet, in very thin shavings or chips and which will not disengage or sever any healthy, normal tissue or cuticle.

Another object is to provide such a knife by use of which part of the blade is shrouded so as to be entirely ineffective, leaving the other portions thereof uncovered for useful operation.

A further object is to generally improve devices of this character.

Other objects, advantages and benefits will become apparent from a consideration of the following description when taken in conjunction with the accompanying drawings forming a part hereof, wherein Fig. 1 is a side elevation of the device.

Fig. 2 is a rear elevation of the device.

Fig. 3 is a front elevation of the device.

Fig. 4 is a longitudinal central section taken on line 4-4 of Fig. 2.

Fig. 5 is a perspective view of the shield plate.

Fig. 6 is a similar view of a shroud plate interchangeable with the shield plate.

Fig. 7 is a view similar to Fig. 4 showing the shroud plate in place.

Fig. 8 is a perspective view of the shroud plate.

Fig. 9 is an end view of Fig. 7

In all the views the same reference characters are employed to indicate similar parts.

The device is designed more especially for use by chiropodists and is made small for convenience in use; in operation it will remove the protuberanoes in extremely thin and small pieces and can never penetrate deeply to produce a dangerous or painful wound.

In the drawing a concave cover plate 10 i has a threaded stem 11 for insertion into a threaded bore in the end of the handle 12. The cover plate 10 overlies the flexible blade 13 and tensions the blade just as in a safety razor; except in this case the cutting edge is curved while in a safety razor the blade is curved transversely and the cutting edge remains straight. The plate 10 has two depending, spaced lugs 14 which extend downwardly thru the notches 1515 in the rear of the guard plate 16 and the shroud plate 17. Each of these plates is concavo-convex, the curve of which corresponds with that of the cover plate 10 so that these surfaces are parallel when in place with the flexed blade t-herebetween.

The plates 1515 each have a hole 18 thru which the stem 11 passes to secure it on the handle.

The guard plate 16 has a slot 19 just in front of the front edge of the blade 13 and a guard bar 20 is tapered to increase the opening thru the slot, and the front surface 22 is slightly rounded to facilitate smooth movement of the tool over the surface operated upon.

The shroud plate 17 has a projection 23 which covers or shrouds the mid-portion of the blade 13 and has its corners removed at 24 to permit the corners 25 of the blade to project. These corners may be used for cutting deeply into contracted areas, as when digging out the core of a corn.

Each of the plates 15'15 has a projection 25 which lies between the projections 14-14 to hold the parts in line.

The rear edge of the blade 13 lies against. the inner surfaces 14-14 of the cover plate.

The blade 13 is substantially square in plan outline with one edge sharpened.

It will be observed that it is the cutting edge of the blade that is flexed or curved and that the blade is concavo-convex inform across the cutting edge.

Having described my invention what I claim as new and desire to secure by Letters Patent, is

1. A tool of the character described, comprising a curved cover plate and a correspondingly curved under plate; a. flexible cutting blade between the plates having tries. v j

a transversely curved cutting edge and plates together and to curve the cutting edge means to hold the plates together and to of the blade, said under plate covering the curve the cutting edge of the blade. mid-portion of said cutting edge, leaving the 10 2. A tool of the character described, comends of said edge exposed,

prising a curved cover plate; a correspond In testimony whereof I hereunto set my ingly curved under plate; a flexible cutting hand. blade between the plates; means to hold the JULIUS STAERK. 

